boopathi/deploy.php

## deploy.php
<?php

class Deploy {

	//
	// EDIT ME
	// This will be sent as the User Agent to the Meta API. Set this as
	// your GITHUB_USERNAME or APPLICATION_NAME
	// Documentation: https://developer.github.com/v3/#user-agent-required
	//
	private $user_agent_string = "Deploy-PHP-Application";

	// -----------------------------------------------------------------------
	// ---------------------- DO NOT EDIT BELOW THIS -------------------------
	// -----------------------------------------------------------------------

	// flags - should be set on construct
	private $clientIP;
	private $is_github;

	public $output;

	// Meta API url
	private $github_meta_api = "https://api.github.com/meta";

	// commands
	private $fuck_off_commands = array(
		'echo "Fuck You"'
	);
	private $do_deploy_commands = array(
		'echo $PWD',
		'whoami',
		"git pull origin master",
		'git status'
	);

	public function __construct() {
		$this->set_client_ip();
		$this->is_github = $this->github_check();

		// If the request is from Github
		if($this->is_github) {
			// then Continue Deployment Procedure
			$this->output = $this->do_exec($this->do_deploy_commands);
		} else {
			// else just ask the user to fuck off
			$this->output = $this->do_exec($this->fuck_off_commands);
		}
	}

	private function do_exec($commands) {
		$output = '';
		if(!$this->is_github) {
			$output .= <<<HTML
<!DOCTYPE HTML>
<html lang="en-US">
<head>
	<meta charset="UTF-8">
	<title>GITHUB WEBHOOK DEPLOYMENT SCRIPT</title>
</head>
<body style="background-color: #000000; color: #FFFFFF; font-weight: bold; padding: 0 10px;">
<pre>
HTML;
		}
		foreach($commands as $c) {
			$tmp = shell_exec($c);
			if(!$this->is_github) {
				$output .= "<span style=\"color: #6BE234;\">\$</span> <span style=\"color: #729FCF;\">{$c}\n</span>";
			} else {
				$output .= "\$ {$c}\n";
			}
			$output .= htmlentities(trim($tmp)) . "\n";
		}
		if(!$this->is_github) {
			$output .= <<<HTML
</pre>
</body>
</html>
HTML;
		}
		return $output;
	}

	// A wrapper that works on all cases to get the Actual client IP
	private function set_client_ip() {
		$client = '';
		if(array_key_exists('HTTP_X_FORWARDED_FOR', $_SERVER)) {
			$client = $_SERVER['HTTP_X_FORWARDED_FOR'];
		} else if(array_key_exists('REMOTE_ADDR', $_SERVER)) {
			$client = $_SERVER['REMOTE_ADDR'];
		} else if(array_key_exists('HTTP_CLIENT_IP', $_SERVER)) {
			$client = $_SERVER['HTTP_CLIENT_IP'];
		}
		$this->clientIP = $client;
	}

	// Check if the requesting client is Github
	private function github_check() {
		$ch = curl_init($this->github_meta_api);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_HEADER, 0);
		curl_setopt($ch, CURLOPT_HTTPHEADER, array(
			"User-Agent: {$this->user_agent_string}"
		));
		$data = curl_exec($ch);
		$json = json_decode($data, true);
		curl_close($ch);
		foreach($json["hooks"] as $cidr) {
			if($this->cidr_match($this->clientIP, $cidr)) {
				return true;
			}
		}
		return false;
	}

	private function cidr_match($ip, $range) {
		list ($subnet, $bits) = explode('/', $range);
	    $ip = ip2long($ip);
	    $subnet = ip2long($subnet);
	    $mask = -1 << (32 - $bits);
	    $subnet &= $mask; # nb: in case the supplied subnet wasn't correctly aligned
	    return ($ip & $mask) == $subnet;
	}

};

$d = new Deploy();

echo $d->output;
	<?php

	class Deploy {

	//
	// EDIT ME
	// This will be sent as the User Agent to the Meta API. Set this as
	// your GITHUB_USERNAME or APPLICATION_NAME
	// Documentation: https://developer.github.com/v3/#user-agent-required
	//
	private $user_agent_string = "Deploy-PHP-Application";

	// -----------------------------------------------------------------------
	// ---------------------- DO NOT EDIT BELOW THIS -------------------------
	// -----------------------------------------------------------------------

	// flags - should be set on construct
	private $clientIP;
	private $is_github;

	public $output;

	// Meta API url
	private $github_meta_api = "https://api.github.com/meta";

	// commands
	private $fuck_off_commands = array(
	'echo "Fuck You"'
	);
	private $do_deploy_commands = array(
	'echo $PWD',
	'whoami',
	"git pull origin master",
	'git status'
	);

	public function __construct() {
	$this->set_client_ip();
	$this->is_github = $this->github_check();

	// If the request is from Github
	if($this->is_github) {
	// then Continue Deployment Procedure
	$this->output = $this->do_exec($this->do_deploy_commands);
	} else {
	// else just ask the user to fuck off
	$this->output = $this->do_exec($this->fuck_off_commands);
	}
	}

	private function do_exec($commands) {
	$output = '';
	if(!$this->is_github) {
	$output .= <<<HTML
	<!DOCTYPE HTML>
	<html lang="en-US">
	<head>
	<meta charset="UTF-8">
	<title>GITHUB WEBHOOK DEPLOYMENT SCRIPT</title>
	</head>
	<body style="background-color: #000000; color: #FFFFFF; font-weight: bold; padding: 0 10px;">
	<pre>
	HTML;
	}
	foreach($commands as $c) {
	$tmp = shell_exec($c);
	if(!$this->is_github) {
	$output .= "<span style=\"color: #6BE234;\">\$</span> <span style=\"color: #729FCF;\">{$c}\n</span>";
	} else {
	$output .= "\$ {$c}\n";
	}
	$output .= htmlentities(trim($tmp)) . "\n";
	}
	if(!$this->is_github) {
	$output .= <<<HTML
	</pre>
	</body>
	</html>
	HTML;
	}
	return $output;
	}

	// A wrapper that works on all cases to get the Actual client IP
	private function set_client_ip() {
	$client = '';
	if(array_key_exists('HTTP_X_FORWARDED_FOR', $_SERVER)) {
	$client = $_SERVER['HTTP_X_FORWARDED_FOR'];
	} else if(array_key_exists('REMOTE_ADDR', $_SERVER)) {
	$client = $_SERVER['REMOTE_ADDR'];
	} else if(array_key_exists('HTTP_CLIENT_IP', $_SERVER)) {
	$client = $_SERVER['HTTP_CLIENT_IP'];
	}
	$this->clientIP = $client;
	}

	// Check if the requesting client is Github
	private function github_check() {
	$ch = curl_init($this->github_meta_api);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_HEADER, 0);
	curl_setopt($ch, CURLOPT_HTTPHEADER, array(
	"User-Agent: {$this->user_agent_string}"
	));
	$data = curl_exec($ch);
	$json = json_decode($data, true);
	curl_close($ch);
	foreach($json["hooks"] as $cidr) {
	if($this->cidr_match($this->clientIP, $cidr)) {
	return true;
	}
	}
	return false;
	}

	private function cidr_match($ip, $range) {
	list ($subnet, $bits) = explode('/', $range);
	$ip = ip2long($ip);
	$subnet = ip2long($subnet);
	$mask = -1 << (32 - $bits);
	$subnet &= $mask; # nb: in case the supplied subnet wasn't correctly aligned
	return ($ip & $mask) == $subnet;
	}

	};

	$d = new Deploy();

	echo $d->output;